Detection device and detection method

Abstract

A detection device is provided which comprises an examination flow channel for passing a fluid containing a detection object, a reference flow channel extending adjacently along the examination flow channel, an interaction film interposed between the examination flow channel and the reference flow channel for causing an interaction thereof, a light emission unit for injecting a detecting light into the reference flow channel, and a detection unit for receiving the detecting light. This device is used for recognizing the state of the detection object in the examination flow channel from deflection of the optical path of the detecting light caused by the interaction.

1. A detection device for detecting a concentration of a detection object, comprising:
 an examination flow channel for passing a first fluid containing a detection object, 
 a reference flow channel for passing a second fluid, extending adjacently along the examination flow channel, 
 a semi-permeable member located between the examination flow channel and the reference flow channel and capable of causing an interaction therebetween, 
 a light emission unit for irradiating the second fluid in the reference flow channel, the light emission unit comprising a semiconductor laser and a turning micromirror to irradiate directly from the laser to a prescribed position, and 
 a detection unit having a plurality of light receiving sensors for receiving the irradiated light by way of the reference flow channel, wherein 
 the concentration of the detection object in the examination flow channel is recognized based on a deflection of an optical path of emitted light caused by a gradient index in the second fluid resulting from the interaction, and 
 the deflection of the optical path is evaluated by differential output of the plurality of light receiving sensors. 
 
     
     
       2. The detection device according to  claim 1 , wherein the semi-permeable member is a heat-conductive film, and the interaction is heat transfer from the examination flow channel to the reference flow channel, and wherein the detection unit measures temperature change in the examination flow channel. 
     
     
       3. The detection device according to  claim 2 , wherein the examination flow channel has plural fluid inlets for introduction of different substances. 
     
     
       4. The detection device according to  claim 2 , wherein the detection unit comprises plural optical detectors arranged substantially in the direction of arrangement of the examination flow channel and the reference flow channel, and the deflection of the optical path of the detecting light is evaluated by differential output from the plural optical detectors. 
     
     
       5. The detection device according to  claim 1 , wherein the detection unit comprises plural optical detectors arranged substantially in the direction of arrangement of the examination flow channel and the reference flow channel, and the deflection of the optical path of the detecting light is evaluated by differential output from the plural optical detectors. 
     
     
       6. A detection method for detecting a concentration of a detection object comprising the steps of:
 providing a detection device having an examination flow channel, a reference flow channel extending adjacently along the examination flow channel, and a semi-permeable member located between the examination flow channel and the reference flow channel for causing an interaction therebetween, 
 introducing a first fluid containing a detection object into the examination flow channel and a second fluid into the reference flow channel, 
 irradiating the second fluid in the reference flow channel using a semiconductor laser and a turning micromirror to irradiate directly from the laser to a prescribed position, and 
 measuring a deflection of an optical path of emitted light caused by a gradient index in the second fluid resulting from the interaction with a detecting unit having a plurality of light receiving sensors to detect the concentration of the detection object, 
 wherein the deflection of the optical path is evaluated by differential output of the plurality of light receiving sensors. 
 
     
     
       7. The detection device according to  claim 1 , wherein the turning micromirror is rotatable to adjust the optical path of the emitted light. 
     
     
       8. The detection device according to  claim 1 , wherein the turning micromirror includes an adjusting unit to turn the micromirror and adjust the optical path of the emitted light. 
     
     
       9. The detection device according to  claim 1 , wherein the detection unit further comprises an optical path adjusting assembly to adjust the optical path of the emitted light. 
     
     
       10. The detection method according to  claim 6 , further comprising the step of rotating the turning micromirror to adjust the optical path of the emitted light. 
     
     
       11. The detection method according to  claim 6 , further comprising the step of providing the detection unit with an optical path adjusting assembly and adjusting the optical path of the emitted light.